A Cleveland man posted a shocking video of himself executing a senior citizen walking down the street yesterday and claimed he killed a dozen more people, sparking hysteria in Ohio along with what has now become a multi-state manhunt.

A manhunt for a suspect who authorities said killed an elderly man and then posted the video on Facebook expanded outside Ohio, with authorities calling on residents of nearby states to be on alert.

Steve Stephens, 37, is suspected of killing 74-year-old Robert Godwin on Sunday in a residential area east of Cleveland, police said.

An aggravated murder warrant has been issued for Stephens.

Police said Sunday night that Stephens “may be out of state at this time,” and called on residents in Pennsylvania, New York, Indiana and Michigan to be vigilant.

Stephen’s cell phone ping was detected about 100 miles east of Cleveland in Erie, Pennsylvania, law enforcement in the area told CNN.

“He is considered armed and dangerous, so we want people to be careful out there,” Cleveland Police Chief Calvin Williams told reporters.

Stephens is a black male who is 6-foot-1 and weighs 244 pounds. He was last seen wearing a dark blue and gray or black striped polo shirt.

Stephens randomly selected 74-year-old Robert Godwin as his victim as Godwin was walking down a street in a  residential area, blamed his girlfriend for what he was about to do, and executed Godwin with a single shot to the head from a Glock pistol before getting in his car and driving away.

There is no evidence at all that Stephens murdered a dozen or more other people prior to Godwin as he claimed.

SHOOTING UPDATE: Suspect vehicle is a white Ford Fusion with temp tag Wanted male still armed and dangerous https://t.co/c2Ypm1i5qx

— Cleveland Police (@CLEpolice) April 16, 2017

Stephens was last seen driving a white 2016 Ford Fusion sedan with temporary Ohio tags, but it is unknown if he is still driving that vehicle at this time.